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  4. Effects of a neurokinin-1 receptor antagonist in the acute phase after thoracic spinal cord injury in a rat model

Effects of a neurokinin-1 receptor antagonist in the acute phase after thoracic spinal cord injury in a rat model

Frontiers in Molecular Neuroscience, 2023 · DOI: 10.3389/fnmol.2023.1128545 · Published: May 12, 2023

Spinal Cord InjuryImmunologyNeurology

Simple Explanation

This study investigates how blocking a specific receptor (neurokinin-1 receptor or NK1R) affects spinal cord injury (SCI) in rats. The receptor is targeted because it plays a role in inflammation after injury. The researchers used a drug called EUC-001 to block NK1R and observed its impact on edema, blood-spinal cord barrier integrity, inflammation, and functional recovery in rats with SCI. The findings suggest that blocking NK1R with EUC-001 might help protect the blood-spinal cord barrier, reduce inflammation, and potentially improve functional recovery in the early stages after SCI.

Study Duration
7 days
Participants
36 female Wistar rats
Evidence Level
Level 3; Animal study

Key Findings

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    Blocking NK1R with EUC-001 reduced the invasion of T-lymphocytes and the number of apoptotic cells in the injured spinal cord.
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    EUC-001 treatment showed a trend towards reduced fibrinogen leakage, endothelial and microglial activation, CS-GAG deposition, and astrogliosis.
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    CatWalk gait analysis indicated an early onset of recovery in several parameters of locomotion with EUC-001 treatment, suggesting improved muscle tone and locomotion.

Research Summary

The study aimed to observe the effect of antagonizing the binding of Substance-P (SP) to its neurokinin-1 (NK1) receptor in a rodent SCI model using a neurokinin-1 receptor antagonist (NRA). Results showed limited effects on reducing edema with NRA treatment. However, the invasion of T-lymphocytes and the number of apoptotic cells were significantly reduced, along with a trend of reduced fibrinogen leakage and endothelial/microglial activation. Conclusion: Intrathecal administration of NRA might reinforce the integrity of the BSCB in the acute phase after SCI, potentially attenuating aspects of neurogenic inflammation, reducing edema formation, and improving functional recovery.

Practical Implications

Therapeutic Potential

Intrathecal administration of NRA could be a potential therapeutic strategy to attenuate neurogenic inflammation and improve functional recovery after SCI.

BSCB Integrity

Reinforcing the integrity of the BSCB through NRA treatment may help reduce edema formation and improve outcomes in SCI.

Early Intervention

Early onset of locomotion recovery observed with NRA treatment suggests that timely intervention is crucial for maximizing functional benefits.

Study Limitations

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